I don't know how to really describe this so I hope it'll make sense. What I am trying to find out is how do I make vertices, that are dividing an edge, move with the edge as if it was whole and the vertices weren't even there, by draggin the end vertex of that edge.
To give you a simplified example with just three vertices I made these screenshots:
I know that I could just dissolve the vertex and divide the edge again after the transform, but this is just a simple example and I want to do this for an already detailed mesh. Proportional editing isn't optimal either for this, I tried.
As an another example, I saw someone do this in this video: https://www.youtube.com/watch?v=e2EU-alJa-Q&t=3m16s at around 3:16. See how the middle edge loop moves along with the lower edge loop scale as if it weren't there? That's what I am looking for basically.